完成态任务的安全返修 / Safely revising completed jobs

[fichil]

QA hashes

• content_sha256: d572841768459beaab7e9d6e82427e87a7d9bfb7bd297388c70872cad13c6707
• qa_report_sha256: 0617dc1fa63464384a12ab9f6a85e8375ad7bcc5e4dfab887fe397bebd34e806

Review summary

• 中文：完成态任务如何安全返修：用状态机绑定请求、草稿与审稿证据
• English: Safely Revising Completed Jobs with a Fail-Closed State Machine
• Slug: fail-closed-revision-for-completed-jobs
• Score: 99/100 (30 + 24 + 20 + 15 + 10)
• Full-history semantic deduplication: passed; the topic is distinct from existing articles about policy snapshots, recurring-job idempotency, artifact identity, and content gates.
• Privacy, source-claim, terminology, logic, bilingual-parity, Hugo, Sites lint/test, and four mobile-preview gates: passed.
• The article preserves an explicit limitation: targeted tests and a sanitized run support the revision lifecycle, while unrelated historical fixtures were not claimed as fully certified.
• Mobile previews: English and Chinese at 390×844 and 360×800, included in the review packet.
• Current review head: 087d8e460dea582e2011038c01e220366d455f31

Closes #94

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